Clarifies the status of implicit accessors; fixed several related bugs.

reflectable/test/mock_tests/check_literal_transform_test.dart

Index: reflectable/test/mock_tests/check_literal_transform_test.dart
diff --git a/reflectable/test/mock_tests/check_literal_transform_test.dart b/reflectable/test/mock_tests/check_literal_transform_test.dart
index 6677ff630ce7dce3d7242eb1cb58dc9c20f90539..3c5e7395fb1adbbae25d4e8cf80ed1a3e97dad30 100644
--- a/reflectable/test/mock_tests/check_literal_transform_test.dart
+++ b/reflectable/test/mock_tests/check_literal_transform_test.dart
@@ -70,7 +70,7 @@ _initializeReflectable() {
         "reflectable package. Remember to set your package-root to "
         "'build/.../packages'.");
   }
-  r.data = {const prefix0.MyReflectable(): new r.ReflectorData([new r.ClassMirrorImpl(r"A", r".A", 0, const prefix0.MyReflectable(), <int>[-1], [], -1, {}, {}, {r"": () => new prefix0.A()}, null)], [new r.MethodMirrorImpl(r"", 64, 0, [], const prefix0.MyReflectable(), null)], [], [prefix0.A], {}, {})};
+  r.data = {const prefix0.MyReflectable(): new r.ReflectorData([new r.ClassMirrorImpl(r"A", r".A", 0, const prefix0.MyReflectable(), <int>[-1], [], [], -1, {}, {}, {r"": () => new prefix0.A()}, null)], [new r.MethodMirrorImpl(r"", 64, 0, 0, [], const prefix0.MyReflectable(), null)], [], [prefix0.A], {}, {})};
 }
 """
   }